Sökning: "contrast agents"

Visar resultat 1 - 5 av 216 avhandlingar innehållade orden contrast agents.

  1. 1. Polymer-shelled Ultrasound Contrast Agents : Characterization and Application

    Författare :Dmitry Grishenkov; Leif Kari; Lars-Åke Brodin; Michel Versluis; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; ultrasound; contrast agents; microbubbles; polymer; perfusion; TECHNOLOGY Engineering physics Acoustics; TEKNIKVETENSKAP Teknisk fysik Akustik; TECHNOLOGY Engineering physics Material physics with surface physics; TEKNIKVETENSKAP Teknisk fysik Materialfysik med ytfysik; MEDICINE Dermatology and venerology; clinical genetics; internal medicine Internal medicine Cardiovascular medicine; MEDICIN Dermatologi och venerologi; klinisk genetik; invärtesmedicin Invärtesmedicin Kardiovaskulär medicin; MEDICINE Dermatology and venerology; clinical genetics; internal medicine Internal medicine Cardiology; MEDICIN Dermatologi och venerologi; klinisk genetik; invärtesmedicin Invärtesmedicin Kardiologi;

    Sammanfattning : Ultrasound-based imaging technique is probably the most used approach for rapid investigationand monitoring of anatomical and physiological conditions of internal organs and tissues.Ultrasound-based techniques do not require the use of ionizing radiation making the tests anexceptionally safe and painless. LÄS MER

  2. 2. Toward increased applicability of ultrasound contrast agents

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Malin Larsson; Lars-Åke Brodin; Anna Bjällmark; Kenneth Caidahl; Jan Engvall; [2015]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Contrast agent; Contrast-to-tissue-ratio; Echocardiography; Endocardial border; Microbubbles; Multimodal; Phantom; Polymer; Ultrasound; Wall motion score index.; Teknik och hälsa; Technology and Health;

    Sammanfattning : Ultrasound is one of the most widely used modalities in medical imaging because of its high cost-effectiveness, wide availability in hospitals, generation of real-time images, and use of nonionizing radiation. However, the image quality can be insufficient in some patients. LÄS MER

  3. 3. Ultrasound Contrast Agents Loaded with Magnetic Nanoparticles Acoustic and Mechanical Characterization

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :VeeraVenkata Satyanarayana Kothapalli; Lars-Åke Brodin; Jan Engvall; [2013]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Ultrasound contrast agents; SPION nanoparticles; harmonic oscillation; backscattering power; attenuation coefficient; phase velocity; nonlinear equation of motion;

    Sammanfattning : The current methodologies in body scanning diagnostic uses different simultaneous imaging modalities like Ultrasound (US), magnetic resonance imaging (MRI), single photon emission tomography (SPECT) and positron emission tomography (PET). The field requires combination of different modalities for effective use in clinical diagnostics. LÄS MER

  4. 4. Studies of Acute Rejection Using Contrast Agents and Magnetic Resonance Imaging

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Eva Penno; Håkan Ahlström; Cecilia Johnsson; Lars Johansson; Peter Leander; [2006]
    Nyckelord :Radiology; Magnetic resonance imaging; contrast agents; organ transplantation; acute rejection; Radiologisk forskning;

    Sammanfattning : Solid organ transplantation is today an established form of treatment for end-stage organ disease. Monitoring of graft function and pharmacological therapy constitutes a maze of clinical observations and histological evaluations of biopsy specimens; with the biopsy results playing a decisive role. LÄS MER

  5. 5. Autonomous Agents and the Concept of Concepts

    Detta är en avhandling från Department of Computer Science, Lund University

    Författare :Paul Davidsson; [1996]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Artificial intelligens; Data- och systemvetenskap; computer technology; Systems engineering; Adaptive Behavior; Anticipation; Cognitive Modeling; Concept Representation; Concept Learning; Artificial Intelligence; Autonomous Agents; Artificiell intelligens;

    Sammanfattning : This thesis has two main themes, autonomous agents and concepts. An autonomous agent is a system capable of interacting with its environment via its own sensors and effectors in order to accomplish some task. Arguments against both purely reactive and purely deliberative agent architectures are presented in favor for hybrid approaches. LÄS MER